24 slides labelled "Decay Detection" showing instruments used. 1 dated '95. Some labelled D. Johnstone. 1. Shigometer. 2. Resistograph. 3. Fractometer. 4.Device (Arborsonic Tester). 5. Plug. 6. Quadrant. 7.Metriguard. 8.Fractometer. 17. Tyromyces. 22. Eucalypt. 23. Ganodderma. 24. Poplar '95 Formes.decay detection, instruments, d. johnstone, trees, arboriculture, shigometer, resistograph, arborsonic tester, quadrant, metriguard, fractometer, tyromyces, ganodderma, poplar 95 formes

27 slides labelled "Diseases". Some individually labelled. Some also labelled "D. Johnstone". 8 June 2000. 1-4. appear to be part of B20.0157. 6-12 Cypress Canker. 13. Teprioadium. 14. "Paint" fungus. 15. Tremetes versicolour. 16. Armillaria (old). 17-18. Laetiporus portentotus. 20. Poplar 95 formes. d. johnstone, arboriculture, tree diseases, cypress canker, teprioadium, tremetes versicolour, armillaria, poplar 95 formes, laetiporus potentotus